Specifications

sigmadue - IEC 61131-3 Function Block Library
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Purpose
The purpose of this document is to describe the structure and use of Ascon Spa’s
proprietary
IEC61131-3 libraries. These libraries cover different aspects of the
features of the CU-02 and MP-01 units: from I/O modules interface to Modbus
access from the control to the logic management.
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Caution
The function blocks of the various libraries are valid for both CU-02 and MP-01
units except when it is expressly indicated.
Description
Chapter 1 AsconACLib is a Function Block library that contains a set of generic functionalities
that come from the Ascon AC Station Device useful for the IEC 61131 programming.
Chapter 2 AsconBasicIOLib (valid only for CU-02 unit) is a Function Block library enabling the
access of Ascon SpA sigmadue line devices from OpenPCS programming environ-
ment.
Thanks to the FBs, the user does not take care of communications details related
to CANopen
1
protocol, but he simply has to access to the available functions of the indi-
vidual devices. The library gives the access to the basic functions of the I/O modules
.
Chapter 3 The AsconControlLib is a Function Block library dedicated to the process control. It
uses the basic functionalities dedicated to the PID implementation present in the
firmware of the control unit (CU-02 and MP-01) device in order to provide solution
ready to use. In fact in the library there is the implementation of a complete stand-
ard regulator in both version: single action and double action for heat and cool
application. Please note that are present also different function blocks dedicated to
the tuning algorithms.
Chapter 4 AsconCPULib (valid only for CU-02 unit) is a function block library that allows the
access to the control unit (CU-02) device of the Ascon sigmadue line, from the
OpenPCS programming tool. These FBs allow the user to set and manage the
CANopen network activities: diagnostic, failure management of the connected
devices, synchronization,…
Chapter 5 AsconMBCommLib is a Function Block library which simplifies the access to the
MODBUS communication ports available in Ascon SpA
sigmadue line devices.
Current Documentation on the Internet
Make sure you are always working with the latest version of this document.
ASCON spa reserves the right to make changes to its products in the name of
technological advancement. New manual revisions, when published, and can be
found online at:
1. A complete series of firmware function blocks implementing the CANopen communi-
cations primitives are available for the user: these FBs grant the access to the module
directly through the CANopen protocol messages. For further details, see “
CANopen
extension for IEC61131-3
” [6] available on the installation CD.